Comparison of the Techniques of Secondary Intraocular Lens Implantation after Penetrating Keratoplasty

Aim. To conduct a retrospective analysis of secondary IOL implantation in patients who underwent PK with no simultaneous IOL implantation. Materials and Methods. The retrospective study of the secondary implantation of IOLs was conducted in 46 eyes that underwent a primary operation with PK and cataract/lens extraction with no IOL implantation due to capsule rupture or combining corneal or intraocular complications. The minimum period from PK was 12 months. All secondary IOL implantations were performed from January 2011 to August 2017. Aphakic postkeratoplasty patients were treated using one of the surgical techniques for secondary IOL implantation. In-the-bag IOL implantation was possible if the posterior capsule was complete. If the lens capsule remnants were sufficient to provide secure IOL support, an in-the-sulcus IOL implantation was performed. Scleral fixation was offered in eyes with extensive capsular deficiency or the presence of the vitreous body in anterior chamber. BCVA and expected and achieved refraction were evaluated; we included using two biometry devices, and results were compared. Results. The corrected distance visual acuity (CDVA) before surgery ranged from 0.1 to 0.8 (mean 0.54 ± 0.17). After secondary IOL implantation, CDVA ranged from 0.2 to 0.8 (mean 0.43 ± 0.14) at postoperative 1 month and from 0.3 to 0.9 (mean 0.55 ± 0.15) at postoperative 6 months (p<0.05). Comparison of the final refraction using two methods of biometry showed no statistically significant difference in the group that underwent scleral fixation of the IOL, similar to the findings for the in-the-bag and in-the-sulcus IOL implantation groups. In the scleral-fixation group, p=0.55 for the USG biometry technique and p=0.22 for the OB technique. p values for the IOL-implantation group were p=0.49 and p=0.44, respectively. Conclusion. Both implantation methods are safe for the patients. Final refraction is depending on the technique and indication to keratoplasty. Both biometry techniques deliver precise data for IOL choice.

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Microperipheral Iridectomy for Troublesome Posterior Synechiolysis in Secondary Intraocular Lens Implantation

Journal of Ophthalmology ◽

10.1155/2021/6634871 ◽

2021 ◽

Vol 2021 ◽

pp. 1-5

Author(s):

Wu Xiang ◽

Jing Li ◽

Wan Chen ◽

Haotian Lin ◽

Weirong Chen

Keyword(s):

Intraocular Lens ◽

Pediatric Patients ◽

Posterior Chamber ◽

Intraoperative Bleeding ◽

Iol Implantation ◽

Secondary Iol Implantation ◽

Peripheral Iridectomy ◽

Surgical Incisions ◽

Posterior Synechiae ◽

Secondary Intraocular Lens Implantation

Purpose. To introduce an effective method for separating extensive posterior synechiae and those located under or adjacent to surgical incisions. Methods. Pediatric patients who had been subjected to cataract surgery and developed troublesome posterior synechiae requiring secondary intraocular lens (IOL) implantation were recruited. All patients underwent microperipheral iridectomy at the 12 o’clock position. Then, an ophthalmic viscosurgical device was injected into the posterior chamber through the iris fistula to mechanically separate the posterior synechiae, using scissors to cut robust posterior synechiae if necessary. The results of posterior synechiolysis and the position of the implanted IOL were analyzed. Results. Sixteen patients (median age, 51.56 months; range, 28–80 months) were included. The scope of posterior synechia in clock was 4.42 (range, 1–10). All troublesome posterior synechiae were successfully separated using the microperipheral iridectomy method, and all patients underwent IOL implantation in the ciliary sulcus. There was one case of peripheral iridectomy-related early intraoperative bleeding; no bleeding was observed at the end of surgery. Conclusions. Microperipheral iridectomy is a useful method for the management of troublesome posterior synechiae during secondary IOL implantation in pediatric patients, which makes secondary IOL implantation an easier and safer method in some challenging cases.

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Clinical Profile and Visual Outcome of Pediatric Cataract Surgeries in West Malaysia

Malaysian Journal of Paediatrics and Child Health ◽

10.51407/mjpch.v26i2.9 ◽

2020 ◽

Vol 26 (2) ◽

pp. 27-34

Author(s):

Xiao Wei Ting ◽

Wee Min Teh ◽

Chin Sern Chan ◽

Nor Fadzillah Abdul Jalil ◽

Julieana Muhammed

Keyword(s):

Cataract Surgery ◽

Visual Outcome ◽

Clinical Profile ◽

Posterior Capsular Opacification ◽

Posterior Chamber ◽

Pediatric Cataract ◽

Iol Implantation ◽

Secondary Iol Implantation ◽

Paediatric Patients ◽

Significant Difference

Purpose: We aim to describe the clinical profile and visual outcome of paediatric patients who underwent cataract surgery in a tertiary ophthalmology referral centre in West Malaysia from 2013 to 2018. Methods: This is a retrospective review of all paediatric patients who underwent cataract surgery in our centre from 2013-2018. Results: A total of 35 eyes from 23 patients were included. There were 10 (43.5%) female and 13 (56.5%) male patients. Twelve patients (24 eyes) had bilateral cataract while 11 patients had unilateral cataract. Sixteen (45.7%) eyes had congenital cataract, followed by ectopia lentis (n=10, 28.6%), traumatic cataract (n=8, 22.9%) and steroid induced cataract (n=1, 2.8%). Three types of intraocular lens (IOL) were implanted: which were posterior chamber IOL (n=22, 62.9%), iris claw IOL (n=12, 34.3%) and scleral-fixated IOL (n=1, 2.8%). Majority of eyes (n=28, 80%) had primary IOL implantation. Twenty-five (71.4%) eyes achieved best corrected visual acuity (BCVA) of 6/12 and better at 6 months post-IOL implantation. There was no statistically significant difference in the BCVA at 6 months post-IOL implantation among the different cataract aetiology, primary or secondary IOL implantation and types of IOL implant. Eight (22.9%) eyes developed post-operative complications, which included posterior capsular opacification (PCO) (n=6, 17.1%), IOL decentration (n=4, 11.4%) and glaucoma (n=1, 2.8%). Nineteen (82.6%) patients required glasses for visual rehabilitation. Conclusion: Majority of the paediatric cataract patients achieved BCVA of 6/12 or better at 6 months post-IOL implantation. The visual outcome among the different cataract aetiology, primary or secondary IOL implantation and types of IOL implanted were similar. PCO was the most common post-operative complication.

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Secondary IOL Implantation without Capsular Support: A Laser Flare Cell Meter Study

ISRN Ophthalmology ◽

10.5402/2011/653246 ◽

2011 ◽

Vol 2011 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Mauro Cellini ◽

Ernesto Strobbe ◽

Pier Giorgio Toschi ◽

Emilio C. Campos

Keyword(s):

Intraoperative Complications ◽

Standard Of Care ◽

Posterior Chamber ◽

Iol Implantation ◽

Secondary Iol Implantation ◽

Secondary Implantation ◽

Laser Flare ◽

Capsular Support ◽

Capsular Bag

Phacoemulsification and the contemporary implantation of intraocular lens (IOL) within the capsular bag represent the standard of care in cataract surgery, but sometimes a primary IOL implant is not possible due to intraoperative complications or preexisting conditions so that a secondary implantation of IOL within the anterior or posterior chamber is necessary. The aim of our study was to assess the degree of inflammation due to a secondary implant of claw lenses, angle-supported IOLs, and scleral-fixated IOLs by means of an objective, repeatable, and noninvasive device, the laser flare cell meter, which evaluates aqueous flare and cells within the anterior chamber in vivo and to show the contribution of the single IOLs to the genesis of inflammation.

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Axial Triangle of the Maxillary Sinus, and its Surgical Implication With the Position of Maxillary Sinus Septa During Sinus Floor Elevation: A CBCT Analysis

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-18-00229 ◽

2020 ◽

Vol 46 (4) ◽

pp. 415-422

Author(s):

Junho Jung ◽

Jung Soo Park ◽

Seoung-Jin Hong ◽

Gyu-Tae Kim ◽

Yong-Dae Kwon

Keyword(s):

Maxillary Sinus ◽

Surgical Techniques ◽

Lateral Sinus ◽

Sinus Floor Elevation ◽

Second Molar ◽

Sinus Wall ◽

Posterior Maxilla ◽

Significant Difference ◽

Sinus Floor ◽

Molar Region

The aim of this study was to measure the convexity of the lateral wall of the maxillary (Mx) sinus and identify the locational distribution of antral septa in relation to the zygomaticomaxillary buttress (ZMB), in order to suggest another anatomical consideration and surgical modification of sinus floor elevation procedures. This study was designed as a cross-sectional study, and a total of 134 patients and 161 sinuses containing edentulous alveolar ridges were analyzed. The angle between the anterior and lateral walls of the Mx sinus (lateral sinus angle [LSA]), and the angle between the midpalatal line and the anterior sinus wall (anterior sinus angle [ASA]) were measured. Mean LSAs and ASAs were 105.9° ± 9.86° and 58.4° ± 6.43°, respectively. No significant difference between left and right sides was found (LSA, P = .420; right = 105.5° ± 9.27°; left = 105.5° ± 9.27° and ASA, P = .564; right = 57.9° ± 6.80°; left = 58.8° ± 6.02°). The prevalence of septa was 37.3%, and it was most frequently noted in the second molar region (32.8%), followed by the first molar (20.9%), retromolar (16.4%), and second premolar regions (14.9%). Septa were most frequently located posterior to the ZMB (49.2%), while ZMB was mostly located in the first molar region (66.4%). Narrow LSAs may complicate the surgical approach to the posterior maxilla, especially when sinus elevation should be used in the second molar region. Considering the occasional presence of antral septa, membrane elevation may be complicated when a septum is encountered during the procedure. These results suggest that 3-dimensional examination of the convexity of the Mx sinus should be performed preoperatively to choose proper surgical techniques and minimize surgical complications.

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Clinical outcomes of the piggyback secondary implantation of a novel multifocal lens in the ciliary sulcus: A case series

European Journal of Ophthalmology ◽

10.1177/11206721211029474 ◽

2021 ◽

pp. 112067212110294

Author(s):

Gerardo Valvecchia ◽

Guadalupe Cervantes-Coste ◽

Oscar Asis ◽

Federico Pereyra ◽

Manuel Garza-León ◽

...

Keyword(s):

Clinical Outcomes ◽

Case Series ◽

Visual Outcome ◽

Iol Implantation ◽

Secondary Implantation ◽

Intermediate Distance ◽

Efficient Alternative ◽

Monofocal Iol ◽

Multifocal Lens ◽

Prospective Case Series

Purpose: Evaluate the clinical outcomes of the secondary piggyback add-on IOL implantation in the ciliary sulcus for pseudophakic patients previously implanted with a monofocal IOL, who pursue a spectacle-free option after IOL surgery. Methods: A prospective case series including seven pseudophakic patients who underwent an in-the-bag monofocal IOL implantation. All eyes underwent a piggyback IOL implantation of the new sulcus designed A4 AddOn IOL in the ciliary sulcus as a secondary procedure for pseudophakic patients pursuing a spectacle-free option for near and intermediate distance after IOL surgery. Results: Seven eyes from six patients were included in this study, from which 4 (71.43%) were female, with a mean age of 58.33 ± 3.5 years (range 54–63; 95% CI 54.66, 62.01). The postoperative spherical equivalent at the 3-month visit was −0.10 m ± 0.82. Also, the UDVA was 0.11 ± 0.08 logMAR, the UIVA 0.01 ± 0.03, and the UNVA 0.01 ± 0.03 3 months after their surgical procedure. Conclusions: The A4 AddOn multifocal IOL’s secondary piggyback implant is an efficient alternative for monofocal pseudophakic patients seeking presbyopia solutions. This sulcus-designed IOL provides an optimal visual outcome for near and distance vision.

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Measurement of femoral posterior condylar offset and posterior tibial slope in normal knees based on 3D reconstruction

BMC Musculoskeletal Disorders ◽

10.1186/s12891-021-04367-6 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Liangxiao Bao ◽

Shengwei Rong ◽

Zhanjun Shi ◽

Jian Wang ◽

Yang Zhang

Keyword(s):

Three Dimensional ◽

Surgical Techniques ◽

Inverse Correlation ◽

Tibial Slope ◽

Posterior Tibial Slope ◽

Lateral Side ◽

Posterior Condylar Offset ◽

Posterior Tibial ◽

Significant Difference ◽

Posterior Condylar

Abstract Background Femoral posterior condylar offset (PCO) and posterior tibial slope (PTS) are important for postoperative range of motion after total knee arthroplasty (TKA). However, normative data of PCO and PTS and the correlation between them among healthy populations remain to be elucidated. The purpose of this study was to determine PCO and PTS in normal knees, and to identify the correlation between them. Methods Eighty healthy volunteers were recruited. CT scans were performed followed by three-dimensional reconstruction. PCO and PTS were measured and analyzed, as well as the correlation between them. Results PTS averaged 6.78° and 6.11°, on the medial and lateral side respectively (P = 0.002). Medial PCO was greater than lateral (29.2 vs. 23.8 mm, P < 0.001). Both medial and lateral PCO of male were larger than female. On the contrary, male medial PTS was smaller than female, while there was no significant difference of lateral PTS between genders. There was an inverse correlation between medial PCO and PTS, but not lateral. Conclusions Significant differences exhibited between medial and lateral compartments, genders, and among individuals. An inverse correlation exists between PCO and PTS in the medial compartment. These results improve our understanding of the morphology and biomechanics of normal knees, and subsequently for optimising prosthetic design and surgical techniques.

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Mobile spine chordoma: results of 166 patients from the AOSpine Knowledge Forum Tumor database

Journal of Neurosurgery Spine ◽

10.3171/2015.7.spine15201 ◽

2016 ◽

Vol 24 (4) ◽

pp. 644-651 ◽

Cited By ~ 30

Author(s):

Ziya L. Gokaslan ◽

Patricia L. Zadnik ◽

Daniel M. Sciubba ◽

Niccole Germscheid ◽

C. Rory Goodwin ◽

...

Keyword(s):

Local Recurrence ◽

Survival Data ◽

Large Scale ◽

Surgical Techniques ◽

En Bloc Resection ◽

Bloc Resection ◽

En Bloc ◽

Increased Risk ◽

Significant Difference ◽

Mobile Spine

OBJECT A chordoma is an indolent primary spinal tumor that has devastating effects on the patient's life. These lesions are chemoresistant, resistant to conventional radiotherapy, and moderately sensitive to proton therapy; however, en bloc resection remains the preferred treatment for optimizing patient outcomes. While multiple small and largely retrospective studies have investigated the outcomes following en bloc resection of chordomas in the sacrum, there have been few large-scale studies on patients with chordomas of the mobile spine. The goal of this study was to review the outcomes of surgically treated patients with mobile spine chordomas at multiple international centers with respect to local recurrence and survival. This multiinstitutional retrospective study collected data between 1988 and 2012 about prognosis-predicting factors, including various clinical characteristics and surgical techniques for mobile spine chordoma. Tumors were classified according to the Enneking principles and analyzed in 2 treatment cohorts: Enneking-appropriate (EA) and Enneking-inappropriate (EI) cohorts. Patients were categorized as EA when the final pathological assessment of the margin matched the Enneking recommendation; otherwise, they were categorized as EI. METHODS Descriptive statistics were used to summarize the data (Student t-test, chi-square, and Fisher exact tests). Recurrence and survival data were analyzed using Kaplan-Meier survival curves, log-rank tests, and multivariate Cox proportional hazard modeling. RESULTS A total of 166 patients (55 female and 111 male patients) with mobile spine chordoma were included. The median patient follow-up was 2.6 years (range 1 day to 22.5 years). Fifty-eight (41%) patients were EA and 84 (59%) patients were EI. The type of biopsy (p < 0.001), spinal location (p = 0.018), and if the patient received adjuvant therapy (p < 0.001) were significantly different between the 2 cohorts. Overall, 58 (35%) patients developed local recurrence and 57 (34%) patients died. Median survival was 7.0 years postoperative: 8.4 years postoperative for EA patients and 6.4 years postoperative for EI patients (p = 0.023). The multivariate analysis showed that the EI cohort was significantly associated with an increased risk of local recurrence in comparison with the EA cohort (HR 7.02; 95% CI 2.96–16.6; p < 0.001), although no significant difference in survival was observed. CONCLUSIONS EA resection plays a major role in decreasing the risk for local recurrence in patients with chordoma of the mobile spine.

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Use of various keratometry data (ring and zone) in trifocal IOL calculation

Modern technologies in ophtalmology ◽

10.25276/2312-4911-2021-5-53-56 ◽

2021 ◽

pp. 53-56

Author(s):

A.D. Loginova ◽

◽

S.V. Shukhaev ◽

S.S. Kudlakhmedov ◽

E.V. Boiko ◽

...

Keyword(s):

Power Distribution ◽

Optical Power ◽

Iol Implantation ◽

Universal Formula ◽

Significant Difference ◽

Trifocal Iol ◽

Iol Calculation ◽

Km Value ◽

Tomographic Data ◽

Corneal Refractive Power

Purpose. To compare the results of trifocal IOL calculation using various corneal tomographic data (ring and zone). Methods. This retrospective study involved 46 patients (46 eyes), underwent cataract surgery with trifocal IOL implantation (AcrySof IQ PanOptix). The calculation was performed using Tomey OA-2000 according to 2 formulas (Barrett II Universal, Olsen). Keratometry values included Km (the average of two main meridians of a cornea) provided by Pentacam HR Power Distribution Apex map, which describes total corneal refractive power (TCRP) with diameter of 3.0, 4.0 and 5.0 mm on a ring and zone. Mean (MAE) and median (MedAE) predicted postoperative refraction errors were assessed after surgery. Results. Mean Km value on 3 mm zone and ring was: 42.75±1,46 D and 42,91±1,43 D, respectively (p<0,0001). Mean Km on 4 mm zone and ring was: 42.6±1.5 D and 43.3 ± 1.5 D, respectively (p <0.005). Mean Km value on 5 mm zone and ring was: 43,09±1,5 D and 43,55±1,48 D, respectively (p<0,0001). Calculations using the Barrett II Universal formula revealed significant difference between MAE and MedAE of the predicted postoperative refraction on 5mm zone and ring (p=0.045). When using the Olsen formula in the calculations, significant difference was revealed using the Km data with a diameter of 3 mm and 5 mm (p=0.001 и p=0.009, respectively). The calculation on 3 mm ring was more accurate than for 3 mm zone. With a 5 mm diameter, the calculation is more accurate according to the zone data. Conclusion. Mean Km value on Power Distribution Apex map according to ring is significantly greater then according to zone. 1) The calculation of the trifocal IOL based on the TCRP zone data is reliably more accurate than the ring data according to both formulas (Barrett II Universal and Olsen) with a diameter of 5 mm. 2) According to the Olsen formula with a diameter of 3 mm, the calculation of the optical power of trifocal IOL based on TCRP ring data is more accurate. Key words: IOL calculation, Trifocal IOL, corneal topography

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Comparable effects on tear film parameters after femtosecond laser-assisted and conventional cataract surgery

International Ophthalmology ◽

10.1007/s10792-020-01532-z ◽

2020 ◽

Vol 40 (11) ◽

pp. 3097-3104 ◽

Cited By ~ 1

Author(s):

Marc Schargus ◽

Svetlana Ivanova ◽

Gesa Stute ◽

H. Burkhard Dick ◽

Stephanie C. Joachim

Keyword(s):

Femtosecond Laser ◽

Cataract Surgery ◽

Dry Eye ◽

Surgical Techniques ◽

Tear Film ◽

Schirmer Test ◽

Fluorescein Staining ◽

Significant Difference ◽

Eye Symptoms ◽

Dry Eye Symptoms

Abstract Purpose Dry eye symptoms after conventional cataract surgery are a very common problem. Until now, only few data are available on objective tear film parameters in regard to femtosecond laser-assisted cataract surgery (LCS). Aim of this study was therefore to analyze and compare tear film parameter changes between LCS and conventional cataract surgery. Methods A consecutive group of 34 patients, scheduled for cataract surgery, were randomly selected for either LCS or conventional cataract surgery (17 patients/group). Tear film assessments including tear film osmolarity, Schirmer test, MMP-9 analysis via quantitative ELISA, corneal sensitivity, corneal fluorescein staining, and conjunctival fluorescein staining were sequentially evaluated pre- as well as 1 and 3 months postoperatively. Results Both groups showed no significant difference in baseline characteristics. All surgeries were performed without any complications. After 1 and 3 months, there was no statistically significant difference in regard to tear film osmolarity (1 month: p = 0.81, 3 months: p = 1.0), Schirmer test (1 month: p = 0.35, 3 month: p = 0.08), and MMP-9 concentration (1 month: p = 0.36, 3 month: p = 0.28) between the two groups. Conclusions Neither LCS nor conventional cataract surgery affected objective tear film parameters significantly during our 3-month postoperative observation period. Hence, both surgical techniques can be equally used to treat patients without prior dry eye symptoms.

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Impact of Acoustic and Interactive Disruptive Factors during Robot-Assisted Surgery—A Virtual Surgical Training Model

Sensors ◽

10.3390/s20205891 ◽

2020 ◽

Vol 20 (20) ◽

pp. 5891

Author(s):

Magret Krüger ◽

Johannes Ackermann ◽

Daniar Osmonov ◽

Veronika Günther ◽

Dirk Bauerschlag ◽

...

Keyword(s):

Robotic Surgery ◽

Video Games ◽

Surgical Techniques ◽

Training Model ◽

German Society ◽

Surgical Experience ◽

Robot Assisted ◽

Cross Sectional ◽

Significant Difference ◽

The Impact

The use of virtual reality trainers for teaching minimally invasive surgical techniques has been established for a long time in conventional laparoscopy as well as robotic surgery. The aim of the present study was to evaluate the impact of reproducible disruptive factors on the surgeon’s work. In a cross-sectional investigation, surgeons were tested with regard to the impact of different disruptive factors when doing exercises on a robotic-surgery simulator (Mimic Flex VRTM). Additionally, we collected data about the participants’ professional experience, gender, age, expertise in playing an instrument, and expertise in playing video games. The data were collected during DRUS 2019 (Symposium of the German Society for Robot-assisted Urology). Forty-two surgeons attending DRUS 2019 were asked to participate in a virtual robotic stress training unit. The surgeons worked in various specialties (visceral surgery, gynecology, and urology) and had different levels of expertise. The time taken to complete the exercise (TTCE), the final score (FSC), and blood loss (BL) were measured. In the basic exercise with an interactive disruption, TTCE was significantly longer (p < 0.01) and FSC significantly lower (p < 0.05). No significant difference in TTCE, FSC, or BL was noted in the advanced exercise with acoustic disruption. Performance during disruption was not dependent on the level of surgical experience, gender, age, expertise in playing an instrument, or playing video games. A positive correlation was registered between self-estimation and surgical experience. Interactive disruptions have a greater impact on the performance of a surgeon than acoustic ones. Disruption affects the performance of experienced as well as inexperienced surgeons. Disruption in daily surgery should be evaluated and minimized in the interest of the patient’s safety.

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